All you need is:
- shop bought puff pastry
- jam (we did this with home made damson jam which is very dark, but any jam works well)
Heat the oven at 200 degrees. Spread the puff pastry (a rectangle) with the jam. Roll it as a swiss roll (along its shorter side). Cut it into slices (around 1.5 cms tick) Cover a baking tray with baking paper and put the slices on top, flatten them a bit. You can paint them with egg yoke, but we found that the jam already gives them a gloss, so we missed this step. Bake for 17-18 minutes until the pastry gets golden and the jam makes them look nice and messy.